Piercing cutoff machine



Jan, 31, W50 H. A. MYERS PIERCING CUTOFF MACHINE 2 Sheets-Sheet z Filed Sept. 14, 1944 Patented Jan. 31, 1950 OFFICE PIERCING cnrortmcm N E corporation of Ohio Application September 14, 19 14; serial-Na; 554,-10'2 4=ciaiinsa ((31.164- 60') This" invention relateetc automatidequiiiment for carrying thrua firescr'ibeEsequence of opera. tions in a cycle, the" s pecificfe'inliodiment of the: disclosure having" to do with the handling? of sections.

This invention hasiutilityw'hen incorporated in tubular stock piercing and" cutting; for accu= racy in predetermined. l'erfg'thsections. The stock as fedup, eithef manually or by power; forthwith puts" the' mach'iii'e operation far gripping such stock, at once the triffacts fo1"the length as set. When the" stock is gripped or locked in the machine a too}- point or pierceris 2 axially somewhat analogous to a one-way jaw c liit'ch b'ythe clanis 9Z It} effective to have a lug l l fixed' with the arr'nt" act on the switch 4 th close contact with companionswitch element l=2 th'eibi connecting a cohdilctorline i3 thru a" solenoid device' mane-line Pitotheline 21 The ciicii-it' is therefore closedfo'r energizing the' de"-- vice M or' a four-way switch device (which may be ofthety-ne of U. sPatQ t 2,300,263, Oct} 27 1942) to co'nnect power fluidyas ccmpressedtair" froin tiie 'line- It tofiow thru a line' I! toacyliii der l8 thrust a piston rod' 19 downward to carry a p-la'te ZB 'Wit'h its depending square'rdds 21? This operation the cylinder 18 is per:-

thrust thru thetutew'allfi Thecut'tingdeiithas 15 mittelPby-thewiahre devibe23 connecting du'cwa thus determined" followed up a? locking" of ffonithe lower 01 oppositeend or the cylinder? the piercerradia11$ "asto the stock andia once- I 8170 an exhaust d1ict25. The arm 6", als shm7ed around relative tuii'iihg f'had, effecting coin by the enddfithe time due to the coatidnhe plete severance" of a seotioii, or peripheral cut}, tween thca'rhs 9, I 0; is rocked c'lear' for reset in the event such be foi-Tpredtermined grooving; 20 alongside the stock 5'1 There is no ovei riiiiziifig; b'utf the" machine: is stopped and the" stock" rleaseii for a resetting; With stockas much as"fii e"in'c1'ie'sin dianieter; the cut-offs" harshest-m the fang'e' off twenty? to twenty-five per" minute; When" smaller stock be handled, withflikewiseless masstobe shifted iiiterinittently, a" nearm doubie'd rate may. be e'fi fective in practice;

Referring to "the drawings:

Fig. 1 is a control diagram showing/cooperating' portions" Of theinventicn mliodim'eht iii atube" nierc'ena'n'd cut o'ff machine; the general position of theparts being in the rest position as the machine is about-to startiirthrusting the piercer;

Fig; 2 is a fragmentary plan view of portions of the machine of'Fi-gt hat the general position of the severing operation just completed, but prior to release ofthe stock; andt Fig. 3 isa partialend' viewfrom-the cut-off 4 stock discharge sid showingrthe general rela-- tion of thepar'ts-as'inZFig. 2

cycle alternating electric current conductor linettherefrom extends toaswitctfl. As tubular stock 5 isthrust thru the' ma'chine, at an t a'd justable predetermined? position -ini the machine; such fed in tube '5- mawstrilre an: aun trto swin'g r suchon its bearingt'l; A compression Helical spring 8 holds :the cy-lindi'ical" beating -providin'gi end of the arm to have its cam side Elofithe-arm 6 against a -coaxiai-fixedic'ani I0 1 The arrn as moved by the tfirustvofithe stocle5} is moved The was: 2 i have wedge races 26 and adjacent" gibovesZT. At the entrance antlexit side of the"- machine there are semi-cylindrical grip or cle'iinb members 28 101 we stock 5. The wedge fates plate 29w brings a switch element 3 l= into con"'- tact-Witha; companion switch element 32; Elec 9 trimcircuitjs therebycompletedfrom the line-3i. thru rthe elements '3 I, 32; as'supplied by a branch-r Theenerg-ized solenoid 35 ove'rcomes'the thrdvw or ho1ding -action-of atorsionspring 3i and pulls ent 2 -,-140;737; Dec: 20; 1938-) thereby to connect 1- a drive wheel 4 I to tur-n a shaft 42 one Tull-360.

Machine stop dzisifbditH-eleis'a" 5- tl'ie c1ockwiserotation of'suchshaft; rides under a switch element 44 to swing such to closed position with a companion switch element 45. To nullify the action of the till-now closed switch ll, I2, from 5, a line i! is now connected up thru the switch 44, 45, with a line 58 to the line l3, thereby effecting a selected different operation of the solenoid device M in the device 23, bringing about a second shift to the former starting position, which is power fluid from the line It by way of the line 24 to the cylinder it, now exhausting from the line H by way of the line 25. The plate is now lifted, timely releasing the dog 38 to engage the stop 39, and with the lifting of the plate 25 there is pulling of the wedge blocks 28 to free the stock 5, not only as to the cut-ofi section as in advance, but release of the major length follower section of the tube 5. With the tube 5 clear of the arm 5, it returns to initial position and the switch H, 12 is opened.

Piercer mounting and actuation Bearings 49 mount the drive shaft 42 in the housing 55 (Fig. 2). On the shaft 42 and fixed therewith in the housing 50 is piercer operating cam 5! with a gear on each side thereof having a toothed portion 52 and an untoothed portion 53. The cam 5! is shown partly broken away in Figure l to disclose parts covered thereby. The shape of the cam 5! is as shown in Figure 3. Axially parallel thereto, bearing providing mem bers 54 are fixed with the frame 55. Olfset toward each other and clear of the stock 5, collars from the members 54 provide support for antifriction bearing mounting the toothed rings of a pair of gears 55 assembled by a pair of intermediate disks 55 into a unit. These disks 56 form therebetween a slide guide 5'! (Fig. 1) for a tool carrier 58. A look plate 59 locates a piercing tool 65 in the carrier 58 in such segment shallow relation as to approach tangency just inward from the tube inner wall, when for severing in lieu of groove depth cutting in cylindrical stock;

The carrier 58 near the lock plate 59 has a roller ill on a mounting shaft or pin 52. This portion of the carrier 58 as protruding from between the disks 56 extends between the members 52, 53, there to have the roller 51 contacted by the cam 5i in the rotation from starting position (Fig. l). The tool point 55 is thus thrust thru the wall of the tubular stock 5.

Holding pierccr thrown for turning operation The disks 55, in addition to the slide guide 51, have parallel thereto a radial guide way 63 for a rib portion 65 of the carrier 58 which carrier has an intermediate web portion in which the tool 65 is mounted. The rib 65 toward the roller 6! has an arc face 55 (Fig. 1). While the carrier 58 is mounted for sliding movement between the pair of disks 56, each of the disks 55 on its face toward the web portion of the carrier 58 has a pivot bearing 51 for a swing dog 58. The are overhang inner face of the dog free end is adapted to be pulled over the arc cam face 66 of the carrier 58, as the tool 55 is thrust to operative position. In this travel, the dog 88 is pulled by a tension spring 59 against the side of the rib 55 until it reaches the face 55, when it at once snaps into holding position, and the nose of the cam 5! is then free of the roller 6 l.

in practice the number of teeth on the members 52 is the same as on the gears 55, which latter gears 55 are also incomplete, each having a relatively short concave arc portion 59 to seat with the convex untoothed portions 53. For instance seventy-five teeth in the members 52 as meshing with seventy-five teeth in the gears 55, insures driving of the disks 56 from a rest position of starting with the concave portions 69' seating at one portion of the convex arc portions 53 to another position of registry therebetween to hold the driven gears 55 and the disks 56 from rotation relatively to the frame 50. During this seventy-five teeth meshing drive, the tool has a turning operation cutting action about the fixed stock 5, from the point of piercing back thereto in 360 for a full cut off. In the event the severed stock not break up, its total length is for but a single circle.

Stop lock for driven tool carrier disks Carried by the frame 5|] are slide guides 10 for sliding dogs H. The outer faces of the wheel members 52, 53, have endless groove cam ways T2, with which dog 1| offset ends 13 coact for thereby thrusting the dog opposite end offsets '14 into the path of lugs 15 upon the outer face of the gears 55. The lugs or stops '15 are located to strike the dogs 1! as the gears 55 run off their toothed portions to the concave portions 69'. There is thus provided a supplemental automatic holding means for the work and cutting tool at rest, notwithstanding the drive shaft 42 be still turning. The counter clockwise rotation of the disks 56 is thus completed for a single cycle of a complete rotation.

Pi'erccr withdrawal Upon the faces of the members 52, 53 as toward each other, and near the commencement of the untoothed portions 55 as coming in from clockwise rotation, cams 16 at the down ends push swing dogs 58 against the resistance of the springs 59 to move clear of the faces 58, while arc portions H from the radially inward portions of these cams engage the roller bearing pin 62 to pull the roller 5| toward the shaft 42 and thereby withdraw the carrier 58 from piercing position in the tube 5. As the dogs 68 ride clear 'of the cam ends 15, the carrier 58 is shifted suiiiciently'for the dogs 68 in their recover pull from the springs 69, to ride against the adjacent side of the rib 65.

As the full withdrawal of the tool approaches, or is fully achieved, the lug 43 has acted thru the switch 44, 45, to operate the wedge clamps 2 l, 28, to release the stock 5 at the entrance and exit sides.

Driven gear stop control The position of the driven gears 55 at starting from rest is still that of being locked by the dogs ii. This locked or holding persists during the piercing effective thrust of the cam 5| for the tool 55. However as entering such interval, the cams i2 have a less radius section '18 (Fig. 3) serving to withdraw the dogs H to clear the lugs '15 for such interval as the lug's75 may pass, when the dogs ll are thrust outward to effect automatic stopping at timely position.

What is claimed and it is desired'to' secure by Letters Patent is:

1. A tube piercing and cut-off machine'comprising a pair of spaced work-gripping means, a

tool carrier relatively rotatable therebetween, actuating means for thrusting the tool adjacent a tangent of the tube into work piercing position, a drive for effecting relative rotation between the carrier and gripped work, 'anda control stopping the drive when the tool in extended piercing position, completes a cut-off operation.

2. A single revolution cut off device to sever tubular stock, comprising, means to hold the stock stationary, a tool to pierce and out said stock, a slidable tool holder, a rotatable means in which said slidable holder is slidably mounted, means to impart a thrust to said holder and tool to pierce said tubular stock, means to give a single rotation to the means which carries the slidable holder, said thrust means being located outside the orbit of rotation of said means that carries the slidable tool holder but engageable with said holder.

3. A cut off device for tubular stock comprising a clamp to hold said tubular stock stationary, reciprocable means to operate said clamp, means rotatable about said stock, a tool holder slidable in said rotatable means, a piercing and cut ofi tool carried by said tool holder, means to impart a thrust to said holder and tool to pierce said stock, means to give a single rotation to said 2 rotatable means to out the stock by said tool, said thrust means being outside the orbit of rotation of said rotatable means but engageable with said tool holder to impart said thrust.

4. A cut off device for tubular stock comprising a sectional clamp to hold the stock against rotation relatively thereto, tool carrying means mounted outwardly from the periphery of the clamped stock, a tool holder slidable in said. means toward and from the stock, a piercing and cut off tool carried by said tool holder, control means to impart a thrust to said holder and tool to cause the tool to pierce said stock, and power means to give a single relative rotation to said carrying means relatively to said stock.

HUBERT A. MYERS.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,279,965 Bacon Sept. 24, 1918 1,386,163 Curtiss Aug. 2, 1921 1,419,936 Ladd June 20, 1922 1,603,859 Midgley Oct. 19, 1926 1,828,371 Hyde et a1 Oct. 20, 1931 1,902,616 Brungardt et a1. Mar. 21, 1933 

